A U.S. Border Patrol agent rides an ATV as he patrols at night between the border structures separating Tijuana, Mexico, left, from San Diego in 2009. A man struck a Border Patrol agent with a rock and stole his ATV early Sunday before being shot, authorities say. Gregory BullThe Associated Press file

A U.S. Border Patrol agent rides an ATV as he patrols at night between the border structures separating Tijuana, Mexico, left, from San Diego in 2009. A man struck a Border Patrol agent with a rock and stole his ATV early Sunday before being shot, authorities say. Gregory BullThe Associated Press file

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Underwood told FOX 5 that agents pursued the the man and at least two Border Patrol agents fired at him during the chase, which ended when the man lost control of the ATV and crashed. The man was shot at least once.

The man, who has not been identified, was taken to the hospital with non-life-threatening injuries, according to NBC 7. The man is believed to be about 19 years old.

No Border Patrol agents were gravely hurt, according to City News Service.

Homicide detectives from the San Diego Police Department are leading the investigation, since the shooting happened within city limits, City News Service said. The FBI is also investigating the incident, according to NBC 7.

“CBP’s Office of Professional Responsibility and U.S. Border Patrol, San Diego Sector is fully cooperating with all investigators,” Border Patrol said in a statement to NBC 7.

President Trump issued a memorandum authorizing deployment of National Guard troops to the U.S.-Mexico border. Since Congress created the Border Patrol in 1924, U.S. presidents have sent National Guard troops to assist with operations at the border.